Investigators analyzing new message regarding Nancy Guthrie as search enters sixth day

Tonight, during the agonizing wait for answers now 6 days into the search for Nancy Guthrie, the FBI and Puma County Sheriff's Department say they are aware of a new message regarding Nancy Guthrie and are actively inspecting it for its authenticity. Authorities have not said what the message contains, but NBC News has reviewed a copy of what authorities describe as a possible ransom note sent to three news organizations earlier this week. The contents of that first letter are consistent with the descriptio ...